OBD-II code · Powertrain (generic, extended)
P2AD9 Reductant Pump Motor Position Sensor Circuit High
Voltage on the reductant pump motor position sensor signal line is above the expected window. Wire shorted to B+ or sensor open.
Is it safe to drive with P2AD9?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to B+
- PossibleOpen sensor
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Pump Motor Position Sensor, Wiring Harness, Scr Module
Related codes
- P2AD6Reductant Pump Motor Position Sensor Circuit
- P2AD7Reductant Pump Motor Position Sensor Range/Performance
- P2AD8Reductant Pump Motor Position Sensor Circuit Low
- P2ADAReductant Tank Temperature Sensor B Range/Performance
- P2ADBReductant Tank Temperature Sensor B Circuit Low
- P2ADCReductant Tank Temperature Sensor B Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.